| 1 |
################################# |
| 2 |
# |
| 3 |
# $Id: DBI.pm,v 1.4 2002/11/17 08:46:42 jonen Exp $ |
| 4 |
# |
| 5 |
# $Log: DBI.pm,v $ |
| 6 |
# Revision 1.4 2002/11/17 08:46:42 jonen |
| 7 |
# + wrapped eval around DBI->connect to prevent deaths |
| 8 |
# |
| 9 |
# Revision 1.3 2002/11/17 06:34:39 joko |
| 10 |
# + locator metadata can now be reached via ->{locator} |
| 11 |
# - sub hash2sql now taken from libdb |
| 12 |
# |
| 13 |
# Revision 1.2 2002/10/25 11:43:27 joko |
| 14 |
# + enhanced robustness |
| 15 |
# + more logging for debug-levels |
| 16 |
# |
| 17 |
# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
| 18 |
# + new |
| 19 |
# |
| 20 |
# |
| 21 |
################################# |
| 22 |
|
| 23 |
package Data::Storage::Handler::DBI; |
| 24 |
|
| 25 |
use strict; |
| 26 |
use warnings; |
| 27 |
|
| 28 |
use base ("Data::Storage::Handler::Abstract"); |
| 29 |
|
| 30 |
use DBI; |
| 31 |
use Data::Dumper; |
| 32 |
use libdb qw( getDbNameByDsn hash2Sql ); |
| 33 |
use Data::Storage::Result::DBI; |
| 34 |
|
| 35 |
# get logger instance |
| 36 |
my $logger = Log::Dispatch::Config->instance; |
| 37 |
|
| 38 |
|
| 39 |
sub getMetaInfo { |
| 40 |
my $self = shift; |
| 41 |
$logger->debug( __PACKAGE__ . "->getMetaInfo()" ); |
| 42 |
return { |
| 43 |
'disconnectMethod' => 'disconnect', |
| 44 |
}; |
| 45 |
} |
| 46 |
|
| 47 |
sub connect { |
| 48 |
|
| 49 |
my $self = shift; |
| 50 |
|
| 51 |
# create handle |
| 52 |
if ( my $dsn = $self->{locator}->{dbi}->{dsn} ) { |
| 53 |
#if ( my $dsn = $self->{locator}->{dsn} ) { |
| 54 |
$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" ); |
| 55 |
|
| 56 |
# HACK: |
| 57 |
# set errorhandler before actually calling DBI->connect |
| 58 |
# in order to catch errors from the very beginning |
| 59 |
#DBI->{HandleError} = $self->{dbi}->{HandleError}; |
| 60 |
|
| 61 |
#use Data::Dumper; print Dumper($self->{dbi}); |
| 62 |
|
| 63 |
eval { |
| 64 |
$self->{COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} ); |
| 65 |
if (!$self->{COREHANDLE}) { |
| 66 |
$logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr ); |
| 67 |
return; |
| 68 |
} |
| 69 |
}; |
| 70 |
$logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@; |
| 71 |
|
| 72 |
} |
| 73 |
$self->configureCOREHANDLE(); |
| 74 |
|
| 75 |
$self->{locator}->{status}->{connected} = 1; |
| 76 |
|
| 77 |
return 1; |
| 78 |
|
| 79 |
} |
| 80 |
|
| 81 |
sub configureCOREHANDLE { |
| 82 |
|
| 83 |
my $self = shift; |
| 84 |
|
| 85 |
$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" ); |
| 86 |
|
| 87 |
# apply configured modifications to DBI-handle |
| 88 |
if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) { |
| 89 |
$self->{COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file}); |
| 90 |
} |
| 91 |
if (exists $self->{locator}->{dbi}->{RaiseError}) { |
| 92 |
$self->{COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError}; |
| 93 |
} |
| 94 |
if (exists $self->{locator}->{dbi}->{PrintError}) { |
| 95 |
$self->{COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError}; |
| 96 |
} |
| 97 |
if (exists $self->{locator}->{dbi}->{HandleError}) { |
| 98 |
$self->{COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError}; |
| 99 |
} |
| 100 |
|
| 101 |
} |
| 102 |
|
| 103 |
sub _sendSql { |
| 104 |
my $self = shift; |
| 105 |
my $sql = shift; |
| 106 |
|
| 107 |
# two-level handling for implicit connect: |
| 108 |
# if there's no corehandle ... |
| 109 |
if (!$self->{COREHANDLE}) { |
| 110 |
# ... try to connect, but ... |
| 111 |
$self->connect(); |
| 112 |
# ... if this still fails, there's something wrong probably, so we won't continue |
| 113 |
if (!$self->{COREHANDLE}) { |
| 114 |
return; |
| 115 |
} |
| 116 |
} |
| 117 |
|
| 118 |
#print "prepare sql: $sql\n"; |
| 119 |
|
| 120 |
my $sth = $self->{COREHANDLE}->prepare($sql); |
| 121 |
$sth->execute(); |
| 122 |
return $sth; |
| 123 |
} |
| 124 |
|
| 125 |
sub sendCommand { |
| 126 |
my $self = shift; |
| 127 |
my $command = shift; |
| 128 |
# TODO: when tracing: yes, do actually log this |
| 129 |
#$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" ); |
| 130 |
my $cmdHandle = $self->_sendSql($command); |
| 131 |
my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle ); |
| 132 |
return $result; |
| 133 |
} |
| 134 |
|
| 135 |
sub getChildNodes { |
| 136 |
my $self = shift; |
| 137 |
my @nodes; |
| 138 |
$logger->debug( __PACKAGE__ . "->getChildNodes()" ); |
| 139 |
if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) { |
| 140 |
my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn}); |
| 141 |
my $key = "Tables_in_$dbname"; |
| 142 |
while ( my $row = $result->getNextEntry() ) { |
| 143 |
push @nodes, $row->{$key}; |
| 144 |
} |
| 145 |
} |
| 146 |
return \@nodes; |
| 147 |
} |
| 148 |
|
| 149 |
sub getListUnfiltered { |
| 150 |
my $self = shift; |
| 151 |
my $nodename = shift; |
| 152 |
my @list; |
| 153 |
$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" ); |
| 154 |
# get list of rows from rdbms by table name |
| 155 |
my $result = $self->sendCommand("SELECT * FROM $nodename"); |
| 156 |
while ( my $row = $result->getNextEntry() ) { |
| 157 |
push @list, $row; |
| 158 |
} |
| 159 |
return \@list; |
| 160 |
} |
| 161 |
|
| 162 |
sub sendQuery { |
| 163 |
my $self = shift; |
| 164 |
my $query = shift; |
| 165 |
#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';"; |
| 166 |
#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql); |
| 167 |
my @crits; |
| 168 |
foreach (@{$query->{criterias}}) { |
| 169 |
my $op = ''; |
| 170 |
$op = '=' if lc $_->{op} eq 'eq'; |
| 171 |
push @crits, "$_->{key}$op'$_->{val}'"; |
| 172 |
} |
| 173 |
my $subnodes = {}; |
| 174 |
map { $subnodes->{$_}++ } @{$query->{subnodes}}; |
| 175 |
# HACK: this is hardcoded ;( expand possibilities! |
| 176 |
my $crit = join(' AND ', @crits); |
| 177 |
my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit); |
| 178 |
return $self->sendCommand($sql); |
| 179 |
} |
| 180 |
|
| 181 |
1; |
Parent Directory
| 
Revision Log
